Can-locking device.



T. SCOTT. CAN LOOKING DEVICE.

APPLICATION FILED PEB.13,1909.

Patented Aug. 10, 1909.

llNl STATES THOMAS SCOTT, OF FARMERSBURG, INDIANA.

CAN-LOCKING DEVICE To all whom it may concern:

Be it known that I, THOMAS SCOTT, a citizen of the United States, residing at Farmersburg, in the county of Sullivan and State of Indiana, have invented certain new and useful Improvements in Can-Locking Devices, of which the following is a specification.

My invention relates to an improved means for locking the closing caps on cans or other receptacles, reierably or use on cansor receptacles a apted to contain gasolene or other explosive.

The object of my invention is to have the cap of an explosive can locked so that when the can is to be filled the dealer is reminded of the fact that when filling the can he will handle an explosive, and it will be also ossible for the user of the can to readily etermine the diflerence between such explosive containing receptacles and ordinary cans containing non-explosives. The user of the can may have a key or not or the key may be only held by the dealer.

A further object of my invention is to provide a construction in which the cap, though locked, may be turned a short distance, in order to let air into the can to permit of the ready pouring of the contents therefrom, though preventing the cap from being entirely unscrewed from the can to permit the l e-filling thereof.

With these and other objects in view my invention consists in certain constructions, combinations and arrangements of parts, the preferred form of which will be first described in connection with the accompanying drawings and then the invention articularly pointed out in the appended c aims.

Referring to the drawings wherein the same part is designated by the same reference numeral wherever it occurs, Figure 1 is a perspective view of the can provided with a screw cap embodying my invention; Fig. 2 is a, section taken on line 2, 2 of Fig. 1; Fig. 3 is a section taken on line 3, 3 of Fig. 2; Fig. 4 is a perspective view of the top of the can with the cap removed; Fig. 5 is a perspective view of the cap in positionwith parts broken away to more clearly show the construction.

1 designates a can or other container of any ordinary or desired form and provided with a cover 2 from which, as shown, extends a spout 3.

4 designates a short cylindrical section Specification of Letters Patent.

Application filed February 13, 1909.

Patented Aug. 10, 1909.

Serial No. 477,786.

exteriorly threaded and secured to the top of the can and surrounding the filling open ing 5 formed in said top. This section is preferably provided at its base with a vent opening 6.

'7 is a semi-circular depression formed in the body of the can at the base of the section 4, and terminating at one end in a square shoulder 8.

9 is the cap adapted to close the filling opening, said cap being formed with a head 10 and a pair of downwardly extending spaced flanges 11, 12, whereby an annular space 13 is provided between them, the in terior of the flange 12 being threaded to ooo erate with the thread on the exterior of t e tube 4. The lower end of the space 13 is preferably closed by the ring ldsecured between the flanges 11 and 12 at their lower en 15 designates a spring of spiral formand located in the annular chamber 13. One end of the spring is secured to the under side of the head 10 by means of the screws or other securing devices 16, and the other end of the spring is formed with a downwardly extending portion 17 which passes through an opening 18 in the ring 14 and inposition to enter the depression 7 in the top of the can body when the cap is screwed down into closing position. The portion 17 of the spring is located in the cap in relation to the depression 7, so that in screwing the cap into place it will pass over the shoulder 8 and into the depression just before the lower end of the cap comes in contact with the top of the can. The cap consequently has to be turned after the projection 17 passes the shoulder 8, in order to make a tight joint between the lower end of the cap and the top 01' the can. Consequently when the cap, after having been screwed down tight on the top of the can is turned back until the projection 17 strikes against the shoulder 8 air will be permitted to pass into the vent opening 6 and cause the free flow of liquid from the can. In the side of the flange 11 I form a key hole slot 19, said slot entering into the annular chamber 13 between the ends 01 the spring, preferably near the end of the spring carrying the projection 17.

20 is a projecting in secured to the inner flange 12 in line wit the key hole slot 19, whereby a key 21 having a hole in its inner end and a cam projection 22 on its side may be placed in the key hole with its opening over the pin 20, whereupon by turning the key the projection 22 Wlll strike the under side of the spring and raise the same so as to raise the projection 17 out of the depression 7 andv permit the cap to be turned and removed from position. When the cap is to be replaced after the can has been filled it is simp y screwed down into position Whereupon the last turn and projection 17 will pass over the shoulder 8 and down into the depression 7, thus locking the cap in position while permitting it to have sufiicient movement to close the can airtight or ermit air to pass under the cap and through t e vent 6.

I realize that considerable variation is possible in the details of construction and arrang'ement of parts without departing from the spirit of my invention, and I therefore do not intend to limit myself to the specific form shown and described.

What I claim as new and desire to secure by Letters Patent is 1. The combination with a receptacle having a fillin opening therein, an eXteriorly threaded tu esurrounding thefilling opening, an interiorly threaded cap ada ted to close the tube, locking means carried y the cap, a

y de ression in the receptacle adjacent to the tu e in which the locking means is adapted to engage when the cap is in position on the tube, the length of the depression being such as to permit of a limited rotation of the cap when in locked position.

2. The combination with a receptacle h av= ing a filling opening therein, a threaded tube surrounding the filling opening, a threaded cap for closing the end of the tube, means for locking the ca 3 when it is in position to close the tube, an means permitting a limited rotation of the cap while it is locked.

3. The combination with a receptacle having a filling opening therein, a closure for the filling opening, means for locking the closure when it is in position to close the opening, and means permitting a limited movement of the closure in relation to the opening while it is locked, whereby the receptacle may be vented.

4. The combination with a receptacle having a filling o ening, of a threaded tube surrounding the filling opening, a cap for closing the tube, said cap comprising a head and two spaced flanges extending downwardly from the head, a spiral spring secured to the head between the flanges provided with a locking )rojection, and a de n'ession having a shoulr or with which sai projection adapted to engage when the cap is in position to close the tube.

In testimony whereof I aliix my signature in presence of two witnesses.

'lHOh-IAS SCOTT. Witnesses:

THOMAS CRARY, ROBERT A. BALDRIDGE. 

